Answer:
3.98V
Explanation:
Given
Pontential difference V as 3v
Energy delivered is 30%,
Recall that Enery E=1/2cv^2 from this E=V^2(since Current C is not provided we can assume a value 2)
So E=V^2
E=3^2=9
At full charge E=9,30%of 9,0.3*9=2.7 energy in capacitor is 9-2.7=6.3
But E=V^2
✓E=V
✓6.3=3.98V
Answer:
J=0.211kg.m/s
Explanation:
The impulse-momentum theorem states:

The velocity before the impact is given by:

For the velocity after the impact:

so:

There could be more than just one answer, since kilograms can be converted to grams, to miligrams, etc.

or

Why?
Let's remember some conversion factors to work with kilograms (kg)

So, we are given the momentum:

We can rewrite the units of the momentum (equivalent) as follow:

and

Note: There could be more equivalent units for the momentum, in example, we could work with equivalent units for meters (distance) and seconds (time).
Have a nice day!
The wave propagates outward horizontally across the surface of the pond. As you can see from the ripples, the water molecules move up and down, <em>perpendicular to the horizontal movement of the wavefronts</em>.
By definition this is a transverse wave.
0.15
Explanation:
Given parameters:
Mass of bookcase = 41kg
Force applied = 65N
Acceleration = 0.12m/s²
Unknown:
Coefficient of kinetic friction between the bookcase and carpet = ?
Solution:
To solve this problem, the forces acting on the bookcase are;
frictional force
net force
applied force
weight
F - f
= ma in the horizontal direction ----- i
F is the applied force
f
is frictional force
m is the mass
a is the acceleration
ma is the net force
In the vertical axis:
R = mg
R is the normal reaction
mg is the weight of the body
f
= μN = μmg , put into equation i
F - μmg = ma
μ is the coefficient of friction
input the variables;
65 - μ(41 x 9.8) = 41 x 0.12
65 - 401.8μ = 4.92
- 401.8μ = 4.92 - 65
- 401.8μ = -60.1
μ =
= 0.15
learn more:
Friction brainly.com/question/6443626
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